Officials want to permanently keep helicopters away from commercial jets taking off and landing at a busy Washington, D.C., airport after the deadliest U.S. aviation accident in more than two decades.

The FAA has reopened two runways at Reagan Airport following the Jan. 29 plane crash between an American Airlines flight and a Black Hawk helicopter.

The FAA is reopening runways at Ronald Reagan Washington National Airport and increasing the arrivals rate as the crash investigation continues.

Officials previously closed runways and decreased the arrivals rate to aid the investigation into the Jan. 29 crash that ...